Google Lens - Discover information about something by taking a photo
EduDo - EduDo is a video discussion platform
Microsoft Lens - Microsoft Lens (formerly known as Office Lens) is an all-in-one application designed for Windows, Android, and Apple devices, allowing you to capture important information from signs, PDFs, whiteboards, and more to add.
Alcamy - Free, open self-learning platform. Learn & teach anything.
GImageReader - gImageReader is a simple Gtk/Qt front-end to the Tesseract OCR Engine.
Courseroot - Biggest online course database on the web